CN201186261Y

CN201186261Y - Swinging rod type differential sieving machine

Info

Publication number: CN201186261Y
Application number: CNU2008200102838U
Authority: CN
Inventors: 杨桦; 杨胜哲
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-01-16
Filing date: 2008-01-16
Publication date: 2009-01-28
Anticipated expiration: 2018-01-16

Abstract

The utility model relates to a rocker type differential screening machine, in particular to a screening device which can guarantee that the grain size demand of matters under a screen of a screening machine is comparatively strict such as graph 1. The structure characteristics are that two screen decks are installed in the screening device, a fixed crude screen deck which is composed of wear-resisting and bending-resisting screen strips is arranged on the upper portion, an undersize sieve slot which is differential reciprocally is matched on the lower portion, and the tail end of a screen shoe of the undersize sieve slot is hinged wit a rocker driving device. After materials enter the machine, the materials pass through the crude screen deck firstly, big materials which are bigger than gaps of the screen strips are screened out along the screen strips by the aid of the inertia of entering the machine, the materials which are smaller than 50 millimeters are scattered from strip-shaped holes of the gaps of the screen strips to the undersize sieve slot to screen finely, matters on an undersize sieve act differentially by the aid of the reciprocation of the undersize sieve slot and the rocker driving device, the matters on the undersize sieve are screened out with the matters on a coarse sieve by the aid of the rebound inertia force, and the matters under the undersize sieve drop like cloudburst, thereby achieving the purpose of screening finely.

Description

Rocker-type differential screen extension set

Technical field:

The utility model rocker-type differential screen extension set is that production divisions such as coal-burning power plant, coal carry out the plant equipment in the screening operation.The screenings discharging-material size that is screening specifically requires a kind of novel screening of comparison strictness to equip.

Background technology:

At present departments such as China's metallurgy, chemical industry, coal, electric power and building materials are with the screening of raw material and fuel because the mixing ratio of material is bigger, contain foreign material, powder containing quantity, moisture grade all unsatisfactory.Especially the screen size of material requires not only to influence the system equipment operate as normal as not reaching working condition requirement under the condition that limits, but also gives the safety in production operation, and very big harm is brought in aspects such as environmental pollution.

As: the furnace charge of circulating fluidized bed boiler, coal and gangue.Its coal is more assorted, and it is many again to contain foreign material.As refuse and plastic products etc. in wooden unit, the ore deposit, contain moisture with it often again in critical condition, and mixing ratio (oversize: screenings) generally also presented 6: 4 situation sometimes at 4: 6.Just especially important to the performance requirement of screening machine like this.If screening efficiency is low, cross fragmentation again again, this increases not only for worker's consumption, the abrasion of disintegrating machine, but also produces the broken phenomenon of serious mistake, and is consequently very unfavorable, wastes very big.

Summary of the invention:

At above-mentioned situation, we are by for many years in the problem practice of development screening, crushing mechanism, process so far in " circulation slit screening machine " and " squirrel-cage circulation screening machine " (05 year patent) in succession, now develop the distant rod-type differential screen of utility model extension set again, it can solve the shortcoming that present technology exists, can overcome stifled sieve phenomenon again effectively, and guarantee screening effect.

The technical scheme that the utility model technical solution problem is adopted is: it adopts the two-stage screening process, as Fig. 1, it comprises screening plant and rocker driver, it is characterized in that being equipped with in the screening plant two compass screen surfaces, top is by the fixed scalping plate wear-resisting, that the flexing resistance grating is formed, that is mating its underpart is past, return differential dusting cover groove, and the dusting cover groove is borrowed the articulated rocker driver of its screen frame (unit) tail end, make its in body, do past, return differential running.

Grating on the scalping plate is grid shapes, the dusting cover face of being installed on the dusting cover groove be board-like, dash bar hole arranged, fix with machine folder method.On the screen frame (unit) structural member of dusting cover groove, have raceway in its both sides, be located on interior four running rollers of body, the screen frame (unit) tail end is equipped with hinge eyes, and hinge eyes and rocking bar are by the swivel pin interlock.

In its rocker driver flywheel is housed, eccentric shaft is housed on the flywheel, adorning on the eccentric shaft and sliding roller, sliding roller is sliding rolling in the slideway of rocking bar, waves thereby drive rocker is forward and backward, drive the dusting cover groove past, return and travel.

After material is gone into machine, at first pass through the scalping plate, will be greater than the big material (〉=50 millimeters) in grating slit, borrowing it to go into machine inertia goes out along grating, and less than 50 millimeters material just from the slit bar hole of scalping bar, be scattering in the dusting cover groove, carry out thin level screening operation again, and thin oversize (greater than the thing of screenings granularity requirements) links mutually by dusting cover groove and rocker driver, thereby produce past, return (forward, retreat) move and the differential swing, with its oversize (thing of fritter and particle) then by means of the effect of return inertia force, just sift out together in company with thick oversize, and this screenings falls as the brush of scrubbing brush like the tempest, thereby obtains the purpose of thin level screening

From Fig. 1 as seen: for guaranteeing the screening effect of screening machine, smooth and easy and not stifled, scalping face and dusting cover face all have the discharging inclination angle, are advisable for general 40 °～50 ° and 10 °～25 °.

The beneficial effects of the utility model are: because this machine adopts the two poles of the earth screening operation, earlier big material (bulk and foreign material thereof) is screened out through the scalping plate, and alleviated treating capacity, load and the resistance of dusting cover groove, and both overcome stifled sieve phenomenon and guaranteed screen-penetrating performance, improved screening efficiency again.Therefore this type screening machine have volume little, exert oneself big, low energy and subtract the advantage of consumption.

Description of drawings:

Fig. 1 is the fundamental diagram of rocker-type differential screen extension set.

Fig. 2 is the mechanical construction drawing of rocker-type differential screen extension set.2 (a) front view, 2 (b) side view.

The specific embodiment:

Below in conjunction with embodiment such as Fig. 2 the utility model being done one specifies.

From Fig. 2 as seen, rocker-type differential screen extension set of the present utility model, it is made of parts such as body 1, cover 2, scalping plate 3, dusting cover groove 4, rocker driver 5 and electric reducers 6.

1, airframe components: it is made up of parts such as body, stock guide, liner plate and cleaning doors.Body adopts plate welding structure spare to make, and has the erection support of scalping face and stock guide below feeding mouth, has rocker driver, electric reducer mounting base in its back case.It should have rigidity sufficiently, and all inner surfaces that contacts with material all are equipped with abrasion-proof backing block, for ease of maintenance repair, has cleaning door on the back case.Body the place ahead is the outlet of the oversize of screen(ing) machine, and securing members such as bolt are leaned in its top with cover parts 2, be combined into one.

2, cover parts: it is that plate welding structure spare is made, and all and contacted inner surface of material all is installed with abrasion-proof backing block, has a cleaning door on it.

3, scalping plate member: it is made up of screen frame (unit), grating, support base and grating securing member.Screen frame (unit) is to adopt the tubing assembly welding to form, grating should have good wearability and flexing resistance, be the strength member that constitutes scalping face, the spacing of its quantity, length and combination thereof, the size in slit depend on all that the screening material properties is different with working condition requirement and decide that generally the gap is 40～50 millimeters.

It is positioned at the below of the deflector chute of body the scalping plate, is engaged on an orientation with it, and the angle of discharge of its installation is 40 °～50 °.

4, dusting cover channel parts: it is the pith that screen(ing) machine is guaranteed screenings granularity requirements and screening efficiency, and it has the compass screen surface of bar hole by past, as to return operation screen frame (unit), board-like dashing, and is contained in parts compositions such as interior four running rollers of body two side wall panels and bearing spider.It is operated in scalping plate below, and it is set the operation inclination angle and is advisable for general 10 °～25 °.The screen frame (unit) tail end connects by swivel pin with rocking bar, and it is past, return motion thereby make.

Screen frame (unit) is to become structural member by channel-section steel with the steel plate assembly welding, and its both sides have raceway, and it is operated on the running roller.Its specification, size are all decided by the working condition requirement of its screen(ing) machine.Compass screen surface adopts abrasion-proof stainless steel plate punching out sieve aperture, and its shape, size depend on character and the working condition requirement that sieves material.For ease of changing consumable accessory, parts such as its securing member should adopt non-corrosive material to make.

5, rocker driver: it is made up of flywheel, eccentric wheel, wheel shaft, dual bearing, axle block, sliding roller and rocking bar etc.Axle block and rocker bearing are respectively that the location is installed in the back case of body.Eccentric shaft is to be fixed on the flywheel (its eccentric throw should be past by the dusting cover groove, do over again and make required stroke and decide), and sliding roller is housed on the eccentric shaft, and its sliding rolling is worked in the slideway of rocking bar; Rocking bar is that plate welding structure spare is made, and on its slideway both sides working face wearing plate is housed, with the sliding roller work that matches.Gear is equipped with in the wheel shaft outer end, and it is by the synchronous cog belt transmitted power that it and deceleration arbor cog; Its characteristic is that flywheel is goed around, and rocking bar is then past, return and wave one time, thereby drives the work of dusting cover groove once.

6, electric reducer: it is installed on the seat board of body back case, generally uses cylindrical gear reducer, and synchronizing jugged tape running is adopted in transmission, noiseless, friction, and stable working is reliable.

Claims

1, rocker-type differential screen extension set, it comprises screening plant and rocker driver, it is characterized in that being equipped with in the screening plant two compass screen surfaces, top is by the fixed scalping plate wear-resisting, that the flexing resistance grating is formed, that is mating its underpart is past, return differential dusting cover groove, the dusting cover groove is borrowed the articulated rocker driver of its screen frame (unit) tail end, make its in body, do past, return differential running.

2, according to the said rocker-type differential screen of claim 1 extension set, it is characterized in that the grating on the scalping plate is grid shapes, the dusting cover face of being installed on the dusting cover groove be board-like, dash bar hole arranged, fix with machine folder method.

3, according to the said rocker-type differential screen of claim 1 extension set, it is characterized in that having raceway in its both sides on the screen frame (unit) structural member of dusting cover groove, be located on interior four running rollers of body, the screen frame (unit) tail end is equipped with hinge eyes, and hinge eyes and rocking bar are by the swivel pin interlock.

4, according to the said rocker-type differential screen of claim 1 extension set, it is characterized in that being equipped with in the rocker driver on flywheel, the flywheel eccentric shaft is housed, adorning on the eccentric shaft and sliding roller, sliding roller is sliding rolling in the slideway of rocking bar, wave thereby drive rocker is forward and backward, drive the dusting cover groove past, return and travel.